1^4 Richmond, Nezv Bit-ds from East Africa. \ A^^\\ 



singular an appearance, and they are undoubted proof of new 

 growth. 



In the Corumba, bird they form about the terminal fifth of the 

 feather. Thus a breast feather measures, from tip to insertion, .75 

 of an inch, of which the buff tip occupies .15 of an inch. A feather 

 from the same region in a June Bobolink, from which the tip has 

 fallen, and which is further worn, measures only .50 of an inch. 

 There can be no reason to question therefore that feathers having 

 these tips are recently grown. I emphasize the point, for I have 

 yet to see an April Bobolink, and I have examined numerous 

 specimens, in which these tips were not prominent. It is, there- 

 fore, not alone upon the Corumba specimen but upon these April 

 birds that I base my theory of a spring moult in Dolichonyx. 

 How or when a caged Bobolink may change plumage no man can 

 predict but among wild birds there is as yet no recorded evidence 

 that the breeding plumage is not acquired by a complete moult. 



DESCRIPTIONS OF TEN NEW SPECIES OF BIRDS 



DISCOVERED BY DR. W. L. ABBOTT IN THE 



KILIMANJARO REGION OF EAST AFRICA.^ 



BY CHARLES W. RICHMOND. 



A VERY valuable collection of birds made several years ago 

 in the Kilimanjaro region of East Africa and presented to the 

 United States National Museum by Dr. W. L. Abbott, not only 

 supplied to the Museum many species previously unrepresented 

 in its collections, but contained numerous species new to science. 

 Various causes, mainly lack of material for comparison, have 

 prevented the correct determination of a large part of the col- 

 lection, although recently, through the generosity of Mi\ A. 



' By permission of Mr. F. W. True, Executive Curator, U. S. National 

 Museum. 



